Automatic valve

ABSTRACT

This valve includes a tubular body having inlet and outlet ports at opposite ends and housing a rotatable valve cut-off member. A cylinder is coaxially mounted to the body and a piston sleeve received by the cylinder is interconnected to the rotatable member to rotate this member between open and closed valve positions. The sleeve includes a collar and the cylinder includes annular closure walls at each end. The collar and closure walls define pressure chambers supplied by fluid to induce reciprocating motion into the sleeve.

United States Patent Rogers 1 Sept. 12, 1972 AUTOMATIC VALVE 3,509,9135/1970 Lewis ..251/58 X [72] Inventor: Gen Rogers, Ballwin, 3,291,44012/1966 Archer et a1 ..251/340 X [73] Assignee: Stile-CroftManufacturers, lnc., Primary Examiner-Arnold Rosenthal St. Louis, Mo.AttrneyCohn and Powell [22] Filed: July 24, 1970 [57] ABSTRACT [21157,913 This valve includes a tubular body having inlet and outlet portsat opposite ends and housing a rotatable Remed Apphcafion Data valvecut-off member. A cylinder is coaxially mounted [63] Continuation-impartof Ser. No. 783,315, Dec. the y and a Piston Sleeve received by the 2 19cylinder is interconnected to the rotatable member to rotate this memberbetween open and closed valve 52 us. Cl ..251/31 251/58 The Sleeveinc'udes a and the cylinder [5 i CI F16: 31/163 includes annular closurewalls at each end. The collar and closure walls define pressure chamberssupplied [58] Field of Search ..251/58, 340, 63.4, 139, 31 by fluid 0induce reciprocating motion into the sleeve. I [56] References Cited n VUNITED STATES PATENTS 8 Claims, Drawing. figures 3,539,147 11/1970 jPaul, Jr .251/58 "1- ""T T m 5/ /47 26 as I 37/ "y/ j 25 AUTOMATIC VALVECROSS REFERENCE TO RELATED APPLICATION This is a continuation-in-part ofcopending application, Ser. No. 783,315 filed Dec. l2, l968.

BACKGROUND OF THE INVENTION This invention relates generally to anautomatic valve in a fluid supply line and in particular to a cut-offvalve operated by fluid pressure.

There are many instances in which cut-off valves, such as ball valves,must be operated automatically for efficient use. For example, suchvalves may not be readily accessible for manual operation. Further, itis often desirable to operate cut-off valves by remote control. Inaddition, the force required to operate the valve is frequently toogreat to be easily accomplished manually.

} ln thepast, the problem of automating cut-off valves of the type underconsideration has'invariable been solved by simply providing a means ofautomatically turning the valve control handle by the use of auxiliaryequipment. This has often been accomplished by simply providing anindependent piston and cylinder arrangement and connecting it by meansof a linkage assembly to the valve handle. Obviously, such anarrangement is bound to be cumbersome in addition to being expensive andit is not a satisfactory solution. An assembly of this kind must bemounted to the valve in close proximity to the operating handle and thepiston and linkage assembly must in many cases be offset so that theymay be adapted to suit a unit originally intended for manual operation.

SUMMARY OF THE INVENTION This automatic valve is directly operated byfluid pressure. It does not rely on an auxiliary leverage systemoperated by an independent piston and cylinder.

The unit is compact, symmetrical and lightweight and may thus be used inconfined locations. It greatly facilitates valve operation by remotecontrol, and the reduction of the moving parts to an absolute minimumprovides a valve which is not only trouble free, but in addition, isrelatively inexpensive to manufacture.

The valve includes a tubular body having an inlet port, an outlet portand a valve chamber disposed between said ports and housing a rotatablevalve member which includes a passage selectively communicating with theinlet and outlet ports. A cylinder is at tached to and disposed aboutsaid valve body. A sleeve is likewise disposed about the valve body andis received by the cylinder in the manner of a piston. Fluid supplied tothe cylinder reciprocates the sleeve and interconnecting means betweenthe sleeve and the valve member oscillate the valve member as the sleeveis reciprocated;

The body includes a longitudinal opening which communicates with thevalve chamber and the interconnecting means includes a transverse pinextending across the sleeve and through the tubular body.

The rotatable valve member is substantially a ball having a surfacegroove disposed transversely of the passage and engageable by the pin toinduce oscillatory movement into the ball.

The sleeve includes first and second transverse pressure faces and thecylinder includes associated first and second transverse pressure faces.Associated pressure faces of the sleeve and cylinder partially definefirst and second pressure chambers and the cylinder includes first andsecond inlet apertures communicating respectively with associatedpressure chambers.

The cylinder includes an annular closure wall which extends between thecylinder and the tubular body and provides the first pressure face. Asecond annular closure wall between the cylinder and the sleeve providesthe second pressure face. The sleeve includes a collar providing thefirst and second pressure faces, the collar being operatively disposedbetween the cylinder annular closure walls.

The longitudinal opening in the tubular body includes opposed abutmentportions disposed in spaced longitudinal relation and engageable by thetransverse pin whereby to provide a stop means defining longitudinaltravel'of the sleeve and rotational travel'of the ball. The opening alsoincludes opposed margin portions engageable by the pin to precluderotation of the sleeve relative to the body.

A fluid source selectively supplies fluid to the cylinder apertures sothat the sleeve performs as a double-acting piston.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is an elevational view in crosssection illustrating the valve in the open position;

FIG. 2 is a similar view illustrating the valve in a closed position,and

FIG. 3 is a fragmentary plan view illustrating the relationship of thesleeve and the valve body when the valve is in the open position.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now by characters ofreference to the drawing, and first to FIG. 1, it will be understoodthat the valve includes a tubular body, generally indicated by numeral10, and provided by threadedly interconnected body portions 11 and 12.The two threadedly connected body portions 11 and 12 provide-adjustmentfor a pair of sealing rings 13 and 14 which seat a rotatable ball member15 housed within a valve chamber 16.

Each of the seals 13 and 14 includes a curved sealing face receiving theball member 15 and facilitating rotation of said ball member 15 aboutits own axis. The upstream sealing ring 13 is recessed to accommodate aconventional O-ring 17. Each of the body portions 11 and 12 includes anannular abutment, 20 and 21 respectively, seating compatible shoulders22 and 23 on associated sealing rings 13 and 14 respectively.

As indicated in FIG. 1, the body portion 11 includes an inlet port 24and the body portion 12 includes an outlet port 25. Further, therotatable ball member 15 includes a central aperture providing a passage26 which, in the valve-open position, is in register with the sealingrings 13 and 14 and aligned with the inlet and outlet ports 24 and 25respectively.

As shown in FIG. 2, the ball member 15 is rotatable to a valve-closedposition in which the surface 27 of the ball 15 effectively closed theinlet port 24 and cuts off flow through the valve.

The ball member 15 is rotated or oscillated by means of a sleeve 30coaxially mounted in reciprocating relation to the body 10.

The sleeve 30 and the ball member 15 are interconnected by means of atransverse pin 31 which extends between opposing side walls of thesleeve 30 and is connected to said sleeve by means of opposing apertures29 into which the pin is fitted. The body includes an opening, generallyindicated by numeral 32, which is provided by cutting away part of thecylindrical side wall of the body portion 12 in the vicinity of thevalve chamber 16. This opening 32 is clearly shown in FIG. 3 andincludes abutment portions 33 and 34 which provide stop means defininglongitudinal movement of the pin 31 relative to the body 10. The opening32 is defined longitudinally by a pair of flat margins or ledges 35,which are disposed adjacent to the pin 31 and which, because the pin 31is effectively connected to the sleeve 30, preclude rotation of thesleeve 30 relative to the body10. Thus, the opening 32 defineslongitudinal and rotational movement of the sleeve 30 relative to thebody 10. g

The ball member includes a transverse groove 36 in its 'surface 27, saidgroove 36 including opposed shoulders 37 and 38, which project asufficient distance up above the ledges 35 to assure engagement of thepin 31 in the groove 36, as the sleeve 30 is reciprocated between theabutments 33 and 34 of the opening 32.

The reciprocating motion of the sleeve 30, relative to the body 10, isinduced by applying fluid pressure to said sleeve 30. To this end, thesleeve 30 is coaxially received within a cylinder, generally indicatedby numeral 40. The cylinder 40 is attached to the body 10 and, in theassembled position, is effectively integral with said body 10. As shownclearly in FIGS. 1 and 2, the cylinder 40 and the body 10 areconfigurated to provide annular abutments 41 and 42, so spaced as toprovide a seat for an I-shaped connector ring 43. The cylinder 40includes a groove 44 receiving a split ring 45, adjacently disposed ofthe connector ring 43. A lock nut 46 is threadedly connected to the endof the body 10 to engage the connector ring 43 against the abutment 42and secure the cylinder 40 to the body 10. The connector ring 43includes inner and outer O-rings 47 and 48 respectively, providing aneffective seal between the cylinder 40 and the body 10.

The connector ring 43 effectively provides a transverse annular closurewall between the cylinder 40 and the body 10 which in turn provides atransverse pressure face 50. At its remote end, the cylinder 40 includesa second annular closure wall 51 between the cylinder 40 and the sleeve30, which provides a second transverse pressure face 52. The closurewall 51 is recessed to accommodate an O-ring 53 providing a seal betweenthe cylinder 40 and the sleeve 30. y

The sleeve 30, which is reciprocatively received within the annularspace between the coaxially related cylinder 40 and tubular body 10, hasan increased diameter at its received end to provide an enlarged annularrim 54 constituting a collar means and providing first and secondtransverse pressure faces 55 and 56. The enlarged rim 54 is recessed toaccommodate inner and outer O-rings 57 and 58 providing seals betweenthe sleeve 30 and the cylinder 40 and body 10 respectively.

The pressure faces and of the connector ring 43 and the enlarged rim 54respectively, partially define a first pressure chamber 60. The pressurefaces 52 and 56 of the closure wall 51 and the enlarged rim 54respectively partially define a second pressure chamber 61. The cylinder40 includes a pair of apertures 62 and 63, constituting first and secondapertures, and communicating respectively with associated first andsecond pressure chambers and 61. Fluid supplied to the first pressurechamber 60 expands said pressure chamber and urges the pressure faces 50and 55 away from each other, thereby inducing longitudinal motion intothe sleeve 30. Conversely, fluid supplied to aperture 63 expands thesecond pressure chamber 61 and urges the pressure faces 52 and 56 awayfrom each other, thereby inducing longitudinal movement into the sleeve30 in the opposite direction. Thus, the sleeve 30 effectively operatesas a double-acting piston and, by supplying fluid pressure from aconventional source such as a compressed air cylinder, indicatedschematically by numeral 64, and including a four-way valve 65, fluidpressure may be supplied to the pressure chamber 60 to rotate the ballmember 15 into a closed position. The use of the four-way valve permitspressure to be supplied or evacuated from either of the pressurechambers 60 and 61 and further, permits pressure to be maintained ineither of said chambers 60 and 61, thereby holding the rotatable ball 15in either the open or closed position as desired.

It is thought that the functional advantages of this automatic cut-offvalve have become fully apparent from the foregoing description ofparts, but for completeness of disclosure, the installation andoperation of the device will be briefly summarized.

When the seals 13 and 14 are positioned with the body portions 11 and 12respectively, the ball member 15 may be seated on one of said seals andthe body portions 11 and 12 threadedly interconnected to house the ballmember 15 within the body 10. The sleeve 30 is then slipped over thebody 10 from the downstream end and the opposed pin apertures 29 alignedwith each other, and with the ledges 35 and the ball member groove 36,to permit insertion of the pin 31 across the sleeve 30. When this isaccomplished, a pinretaining spring 39 may be placed within the grooveprovided for it on the surface of the sleeve 30 to hold the pin 31 inplace.

The combined sleeve 30 and the body 10 are inserted within the cylinder40 and the connector ring 43, the retaining ring 45 and the lock nut 46sequentially positioned to provide the completed valve assemblyindicated clearly in FIGS. 1 and 2. The valve is coupled to an airsupply, diagrammatically indicated by numeral 64 and including afour-way valve 65. The valve 65 is connected to the first and secondpressure chambers 60 and 61 by virtue of apertures 62 and 63respectively.

When fluid pressure is supplied to the pressure chamber 61, the sleeveis urged in a downstream direction until the pin 31 engages opposedabutment 34 as shown is FIG. 1. In this position, the passage 26 of therotatable ball 15 is aligned with the inlet and outlet ports 24 and 25.When it is desired to close the valve, fluid pressure is introduced intopressure chamber 60, to urge the sleeve 30 in an upstream direction andoscillate the ball in a counterclockwise direction to a closed positionas shown in FIG. 2. Upstream movement of the sleeve 30 is limited by theengagement of the pin 31 with the upstream abutment 33 of the opening 32and, in this position, the spherical surface of the ball 15 cuts offflow through the valve. The use of a four-way valve 65 provides that theautomatic :valve may be held in an open or closed position as desired.

It will be understood that the preferred embodiment as described aboveprovides a means of operating the valve between open and closedpositions by utilizing the sleeve 30 as a double-acting piston. if itshould prove desireable, resilient means, such as a coiled spring, couldbe provided in either one of the pressure chambers and the'valveoperated automatically by applying fluid pressure sufficiently great toovercome the bias of the springand induce longitudinal movement into thesleeve 30 thereby oscillating the rotatable ball valve 15. The releaseof pressure in the pressurized cylinder would result in the springmoving said sleeve 30 inthe opposite direction.

I claim as my invention:

1. An automatic valve comprising:

a. a valve body including an inlet port, an outlet port and a valvechamber disposed between said ports,

b. a rotatable valve member mounted in the valve chamber and including apassage selectively com? municating with the inlet and outlet ports,

0. cylinder means disposed about the valve body and, a first pressureface between the cylinder means and valve body, the cylinder meanshaving one end transversely spaced from the body,

d. sleeve means slidably disposed about the valve body and inovinglyreceived in the space between the said one end of the cylinder means andthe valve body, the sleeve means having a pressure face that cooperateswith the said first pressure face to provide a pressure chamber, I

e. means selectively supplying fluid pressure to the pressure chamberincident to reciprocating of said sleeve means, and

f. interconnecting means between the sleeve means and the rotatablevalve member oscillating said valve member as the sleeve means isreciprocated.

2. An automatic valve comprising:

a. a valve body including an inlet port, an outlet port and a valvechamber disposed between said ports,

b. a rotatable valve member mounted in the valve chamber and including apassage selectively communicating with the inlet and outlet ports,

c. cylinder means disposed about the valve body and, a first pressureface between the cylinder means and valve body, the cylinder meanshaving one end transversely spaced from the body,

d. sleeve means slidably disposed about the valve body and movinglyreceived in the space between the said one end of the cylinder means andthe valve body, the sleeve means having a pressure face that cooperateswith the said first pressure face to provide a pressure chamber,

e. means selectively supplying fluid pressure to the pressure chamberincident to reciprocating of said sleeve means, and

f. interconnecting means between the sleeve means and the rotatablevalve member oscillating said valve member as the sleeve means isreciprocated,

, g. the sleeve means including a portion extending h. theinterconnecting means includes an elongate transverse pin extendingbetween said'side wall portions, and v i. the rotatable valve memberincludes asurface groove disposed transversely of the passage andengageable by the transverse pin.

4. An automatic valve comprising:

a. a tubular valve body including an inlet port, and outlet port, avalve chamber disposed between said ports, and a longitudinal opening,

b. a rotatablevalve member mounted in the valve chamber and including apassage selectively cornmunicating with the inlet and outlet ports,

c. a cylinder disposed in coaxial relation about the valve body andincluding inwardly extending closure means providing a pressure face,

d. a sleeve disposed in coaxial relation about the valve body andincluding a pressurefa'ce disposed in selectively spaced relationfromthe pressure face of the closure means and cooperating with saidpressure face to partially define a pressure chamber said sleeveincluding a portion extending selectively longitudinally outwardly fromthe pressure face of the closure means,

e. the cylinder including an aperture communicating with the pressurechamber and adapted to selectively supply fluid under pressureto thepressure chamber incident to reciprocation of the sleeve,

and i f. interconnecting means between the longitudinally extendingportion of the sleeve and the rotatable valve member extending throughthe longitudinal opening and oscillating the valve member when thesleeve is reciprocated.

5. An automatic valve comprising:

a. a tubular valve body including an inlet port, an outlet port, a valvechamber disposed between said ports, and a longitudinal opening,

b. a rotatable valve member mounted in the valve chamber and including apassage selectively communicating with the inlet and outlet ports,

c. a cylinder disposed in coaxial relation about the valve body andincluding inwardly extending closure means providing a pressure face,

d. a sleeve disposed in coaxial relation about the valve body andincluding a pressure face disposed in selectively spaced relation fromthe pressure face of the closure means and cooperating with saidpressure face to partially define a pressure chamber,

e. the cylinder including an aperture communicating with the pressurechamber and adapted to selectively supply fluid under pressure to thepressure chamber incident to reciprocation of the sleeve,

f. interconnecting means between the sleeve and the rotatable valvemember extending through the longitudinal opening and oscillating thevalve member when the sleeve is reciprocated,

g. the rotatable valve member including opposed abutment portions,

h. the interconnecting means between the sleeve and the rotatable valvemember including a transverse pin extending across the sleeve andthrough the body opening to selectively engage said abutment portions,and

i. the longitudinal opening including opposed abutment portions disposedin spaced longitudinal relation and engageable by the pin to providestop means defining the longitudinal travel of the sleeve.

6. An automatic valve as defined in claim 4, in which:

g. the cylinder closure means includes an annular wall extendingtransversely between the cylinder and the sleeve providing the cylinderpressure face, and

h. the sleeve includes collar means providing the sleeve pressure face.

7. An automatic valve as defined in claim 4, in which:

g. the cylinder closure means includes an annular wall between thecylinder and the tubular body providing a first pressure face,

h. the cylinder closure means includes a second annular wall extendingtransversely between the cylinder and the sleeve, and providing asecondary pressure face,

i. the sleeve is slidably received within the second annular wall andincludes collar means providing first and second pressure facesoperatively disposed between the cylinder annular walls,

j. associated cylinder and sleeve pressure faces define first and secondpressure chambers, k. the cylinder includes a second aperturecommunicating with the second pressure chamber and adapted toselectively supply fluid under pressure to the second pressure chamberincident to reciprocation of the sleeve.

8. An automatic valve comprising:

a. a tubular valve body including an inlet port, an outlet port, a valvechamber disposed between said ports, and a longitudinal opening,

b. a rotatable valve member mounted in the valve chamber and including apassage selectively communicating with the inlet and outlet ports,

c. a cylinder disposed in coaxial relation about the valve body andincluding inwardly extending closure means providing a pressure face,

d. a sleeve disposed in coaxial relation about the valvebody andincluding a pressure face disposed in selectively spaced relation fromthe pressure face of the closure means and cooperating with saidpressure face to partially define a pressure chamber,

e. the cylinder including an aperture communicating with the pressurechamber and adapted to selectively supply fluid under pressure to thepressure chamber incident to reciprocation of the sleeve,

f. interconnecting means between the sleeve and the rotatable valvemember extending through the longitudinal opening and oscillating thevalve member when the sleeve is reciprocated, g. the interconnectingmeans between the sleeve and the rotatable valve member including atransverse pin extending across the sleeve and through the body opening,and

h. the body opening including opposed margins disposed in side-by-siderelation and engageable with the pin to preclude relative coaxialrotation between the sleeve and the body.

1. An automatic valve comprising: a. a valve body including an inletport, an outlet port and a valve chamber disposed between said ports, b.a rotatable valve member mounted in the valve chamber and including apassage selectively communicating with the inlet and outlet ports, c.cylinder means disposed about the valve body and, a first pressure facebetween the cylinder means and valve body, the cylinder means having oneend transversely spaced from the body, d. sleeve means slidably disposedabout the valve body and movingly received in the space between the saidone end of the cylinder means and the valve body, the sleeve meanshaving a pressure face that cooperates with the said first pressure faceto provide a pressure chamber, e. means selectively supplying fluidpressure to the pressure chamber incident to reciprocating of saidsleeve means, and f. interconnecting means between the sleeve means andthe rotatable valve member oscillating said valve member as the sleevemeans is reciprocated.
 2. An automatic valve comprising: a. a valve bodyincluding an inlet port, an outlet port and a valve chamber disposedbetween said ports, b. a rotatable valve member mounted in the valvechamber and including a passage selectively communicating with the inletand outlet ports, c. cylinder means disposed about the valve body and, afirst pressure face between the cylinder means and valve body, thecylinder means having one end transversely spaced from the body, d.sleeve means slidably disposed about the valve body and movinglyreceived in the space between the said one end of the cylinder means andthe valve body, the sleeve means having a pressure face that cooperateswith the said first pressure face to provide a pressure chamber, e.means selectively supplying fluid pressure to the pressure chamberincident to reciprocating of said sleeve means, and f. interconnectingmeans between the sleeve means and the rotatable valve memberoscillating said valve member as the sleeve means is reciprocated, g.the sleeve means including a portion extending longitudinally outwardlyof the spaced end, and h. the interconnecting means including atransverse element projecting from said extending portion and throughthe body to engage the valve member.
 3. An automatic valve as defined inclaim 1, in which: g. the sleeve means includes a portion extendinglongitudinally outwardly from said spaced end of the cylinder means andhaving opposed side wall portions, h. the interconnecting means includesan elongate transverse pin extending between said side wall portions,and i. the rotatable valve member includes a surface groove disposedtransversely of the passage and engageable by the transverse pin.
 4. Anautomatic valve comprising: a. a tubular valve body including an inletport, and outlet port, a valve chamber disposed between said ports, anda longitudinal opening, b. a rotatable valve member mounted in the valvechamber and including a passage selectively communicating with the inletand outlet ports, c. a cylinder disposed in coaxial relation about thevalve body and including inwardly extending closure means providing apressure face, d. a sleeve disposed in coaxial relation about the valvebody and including a pressure face disposed in selectively spacedrelation from the pressure face of the closure means and cooperatingwith said pressure face to partially define a pressure chamber saidsleeve including a portion extending selectively longitudinallyoutwardly from the pressure face of the closure means, e. the cylinderincluding an aperture communicating with the pressure chamber andadapted to selectively supply fluid under pressure to the pressurechamber incident to reciprocation of the sleeve, and f. interconnectingmeans between the longitudinally extending portion of the sleeve and therotatable valve member extending through the longitudinal opening andoscillating the valve member when the sleeve is reciprocated.
 5. Anautomatic valve comprising: a. a tubular valve body including an inletport, an outlet port, a valve chamber disposed between said ports, and alongitudinal opening, b. a rotatable valve member mounted in the valvechamber and including a passage selectively communicating with the inletand outlet ports, c. a cylinder disposed in coaxial relation about thevalve body and including inwardly extending closure means providing apressure face, d. a sleeve disposed in coaxial relation about the valvebody and including a pressure face disposed in selectively spacedrelation from the pressure face of the closure means and cooperatingwith said pressure face to partially define a pressure chamber, e. thecylinder including an aperture communicating with the pressure chamberand adapted to selectively supply fluid under pressure to the pressurechamber incident to reciprocation of the sleevE, f. interconnectingmeans between the sleeve and the rotatable valve member extendingthrough the longitudinal opening and oscillating the valve member whenthe sleeve is reciprocated, g. the rotatable valve member includingopposed abutment portions, h. the interconnecting means between thesleeve and the rotatable valve member including a transverse pinextending across the sleeve and through the body opening to selectivelyengage said abutment portions, and i. the longitudinal opening includingopposed abutment portions disposed in spaced longitudinal relation andengageable by the pin to provide stop means defining the longitudinaltravel of the sleeve.
 6. An automatic valve as defined in claim 4, inwhich: g. the cylinder closure means includes an annular wall extendingtransversely between the cylinder and the sleeve providing the cylinderpressure face, and h. the sleeve includes collar means providing thesleeve pressure face.
 7. An automatic valve as defined in claim 4, inwhich: g. the cylinder closure means includes an annular wall betweenthe cylinder and the tubular body providing a first pressure face, h.the cylinder closure means includes a second annular wall extendingtransversely between the cylinder and the sleeve, and providing asecondary pressure face, i. the sleeve is slidably received within thesecond annular wall and includes collar means providing first and secondpressure faces operatively disposed between the cylinder annular walls,j. associated cylinder and sleeve pressure faces define first and secondpressure chambers, k. the cylinder includes a second aperturecommunicating with the second pressure chamber and adapted toselectively supply fluid under pressure to the second pressure chamberincident to reciprocation of the sleeve.
 8. An automatic valvecomprising: a. a tubular valve body including an inlet port, an outletport, a valve chamber disposed between said ports, and a longitudinalopening, b. a rotatable valve member mounted in the valve chamber andincluding a passage selectively communicating with the inlet and outletports, c. a cylinder disposed in coaxial relation about the valve bodyand including inwardly extending closure means providing a pressureface, d. a sleeve disposed in coaxial relation about the valve body andincluding a pressure face disposed in selectively spaced relation fromthe pressure face of the closure means and cooperating with saidpressure face to partially define a pressure chamber, e. the cylinderincluding an aperture communicating with the pressure chamber andadapted to selectively supply fluid under pressure to the pressurechamber incident to reciprocation of the sleeve, f. interconnectingmeans between the sleeve and the rotatable valve member extendingthrough the longitudinal opening and oscillating the valve member whenthe sleeve is reciprocated, g. the interconnecting means between thesleeve and the rotatable valve member including a transverse pinextending across the sleeve and through the body opening, and h. thebody opening including opposed margins disposed in side-by-side relationand engageable with the pin to preclude relative coaxial rotationbetween the sleeve and the body.